/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
**     the names of its contributors may be used to endorse or promote
**     products derived from this software without specific prior written
**     permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/

#include <QtGui>

#include "highlighter.h"

//! [0]
Highlighter::Highlighter(QTextDocument *parent)
    : QSyntaxHighlighter(parent)
{
    HighlightingRule rule;

    keywordFormat.setForeground(Qt::darkBlue);
    keywordFormat.setFontWeight(QFont::Bold);
    keywordFormat.setFontItalic(true);
    QStringList keywordPatterns;
    keywordPatterns << "\\brect" << "\\bcircle" << "\\bspeed" << "\\btriangle" << "\\bdelay" << "\\bcross" << "\\stroke" << "\\bstroke\\b";
    foreach (const QString &pattern, keywordPatterns) {
        rule.pattern = QRegExp(pattern+"+(?=\\()");
        rule.format = keywordFormat;
        highlightingRules.append(rule);
        //! [0] //! [1]
    }
    //! [1]

    //! [2]
    variableFormat.setFontWeight(QFont::Bold);
    variableFormat.setForeground(Qt::darkMagenta);
    QStringList variablePatterns;
    variablePatterns << "\\bparam[12345]\\b" << "\\bwidth\\b" << "\\bheight\\b" << "\\bdepth\\b"  << "\\bbrush\\b";
    foreach(const QString &pattern, variablePatterns){
        rule.pattern = QRegExp(pattern);
        rule.format = variableFormat;
        highlightingRules.append(rule);
    }
    //! [2]

    //! [3]
    singleLineCommentFormat.setForeground(Qt::red);
    rule.pattern = QRegExp("//[^\n]*");
    rule.format = singleLineCommentFormat;
    highlightingRules.append(rule);

    multiLineCommentFormat.setForeground(Qt::red);
    //! [3]

    //! [4]
    quotationFormat.setForeground(Qt::darkGreen);
    rule.pattern = QRegExp("\".*\"");
    rule.format = quotationFormat;
    //highlightingRules.append(rule);
    //! [4]

    //! [5]
    functionFormat.setFontItalic(true);
    functionFormat.setForeground(Qt::blue);
    rule.pattern = QRegExp("\\b[A-Za-z0-9_]+(?=\\()");
    rule.format = functionFormat;
    //highlightingRules.append(rule);
    //! [5]

    //! [6]
    commentStartExpression = QRegExp("/\\*");
    commentEndExpression = QRegExp("\\*/");
}
//! [6]

//! [7]
void Highlighter::highlightBlock(const QString &text)
{
    foreach (const HighlightingRule &rule, highlightingRules) {
        QRegExp expression(rule.pattern);
        int index = expression.indexIn(text);
        while (index >= 0) {
            int length = expression.matchedLength();
            setFormat(index, length, rule.format);
            index = expression.indexIn(text, index + length);
        }
    }
    //! [7] //! [8]
    setCurrentBlockState(0);
    //! [8]

    TextBlockData *data = new TextBlockData;

    int leftPos = text.indexOf('(');
    while (leftPos != -1) {
        ParenthesisInfo *info = new ParenthesisInfo;
        info->character = '(';
        info->position = leftPos;

        data->insert(info);
        leftPos = text.indexOf('(', leftPos + 1);
    }

    int rightPos = text.indexOf(')');
    while (rightPos != -1) {
        ParenthesisInfo *info = new ParenthesisInfo;
        info->character = ')';
        info->position = rightPos;

        data->insert(info);

        rightPos = text.indexOf(')', rightPos +1);
    }

    setCurrentBlockUserData(data);
}
//! [11]



TextBlockData::TextBlockData()
{
    // Nothing to do
}

QVector<ParenthesisInfo *> TextBlockData::parentheses()
{
    return m_parentheses;
}


void TextBlockData::insert(ParenthesisInfo *info)
{
    int i = 0;
    while (i < m_parentheses.size() &&
           info->position > m_parentheses.at(i)->position)
        ++i;

    m_parentheses.insert(i, info);
}
